The MILWAUKEE OPEN-LOK 1-3/8 Carbide Teeth Multi-Material Oscillating Multi-Tool Blades have a unique aggressive tooth design for cutting wood, screws, nails, cement board, plaster, and more. Carbide Teeth blades last up to 50X longer than standard bi-metal blades and can be used in a wide range of materials while maintaining longer blade life. The thin kerf design and aggressive Carbide Teeth offer faster cuts and better cutting performance in wood or wood with embedded fasteners. These blades feature a reinforced Universal Fit OPEN-LOK anchor for better strength & control and allow for quick blade changes across 100+ multi-tools. Not compatible with Starlock tools. MILWAUKEE oscillating multi-tool blades are designed and made in the USA with global materials.